Operation CHARM: Car repair manuals for everyone.
Manuals through 2025 now available!

Our trusted friends have launched a new website named LEMON, which has newer manuals. It also contains all the CHARM manuals.

LEMON is the spiritual successor to CHARM, I recommend you try it!

Link: lemon-manuals.la or lemon-manuals.org.ua

(Some people have issue connecting. LEMON is investigating. For now, use Firefox or change your DNS server)

Or, hide this message: temporarily or permanently

Generator Noise Test

Noise from a generator may be caused by the following conditions:
^ A loose drive pulley
^ Loose mounting bolts
^ Worn or dirty bearings
^ A defective diode
^ A defective stator

Refer to Computers and Control Systems for diagnosis of the PCM-controlled generator. Testing and Inspection